Planetary hours
in Grenoble.
The day, from sunrise to sunset, is cut into twelve equal hours; so is the night, from sunset to the next sunrise. Each hour carries a planet, in the Chaldean order. A planetary hour therefore lasts 60 minutes only at the equinoxes: it all depends on the date and the city. Here are the exact hours for your city; what you do with them is up to you.
Planetary day of Saturday, 17 October 2026: day of Saturn
- Sunrise
- 07:55
- Sunset
- 18:48
- Next sunrise
- 07:56
A day hour lasts 54 min; a night hour, 1h 06m. Local time (Europe/Paris).
Day
- 1♄︎ Saturn07:55 – 08:49
- 2♃︎ Jupiter08:49 – 09:44
- 3♂︎ Mars09:44 – 10:38
- 4☉︎ Sun10:38 – 11:33
- 5♀︎ Venus11:33 – 12:27
- 6☿︎ Mercury12:27 – 13:22
- 7☽︎ Moon13:22 – 14:16
- 8♄︎ Saturn14:16 – 15:11
- 9♃︎ Jupiter15:11 – 16:05
- 10♂︎ Mars16:05 – 16:59
- 11☉︎ Sun16:59 – 17:54
- 12♀︎ Venus17:54 – 18:48
Night
- 1☿︎ Mercury18:48 – 19:54
- 2☽︎ Moon19:54 – 21:00
- 3♄︎ Saturn21:00 – 22:05
- 4♃︎ Jupiter22:05 – 23:11
- 5♂︎ Mars23:11 – 00:17
- 6☉︎ Sun00:17 – 01:22
- 7♀︎ Venus01:22 – 02:28
- 8☿︎ Mercury02:28 – 03:34
- 9☽︎ Moon03:34 – 04:39
- 10♄︎ Saturn04:39 – 05:45
- 11♃︎ Jupiter05:45 – 06:51
- 12♂︎ Mars06:51 – 07:56
Other cities · France
Questions
How are the planetary hours calculated in Grenoble?
On Saturday, 17 October 2026, the Sun rises at 07:55 and sets at 18:48: the day lasts 10h 53m, that is twelve day hours of 54 min. The night, until the next sunrise at 07:56, lasts 13h 08m: twelve night hours of 1h 06m.
Which planet rules the first hour that day?
Saturn, from 07:55 to 08:49: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: Jupiter, Mars, the Sun, Venus, Mercury, the Moon, then Saturn again.
Today’s sky, on YOUR chart
Planetary hours are the same for everyone in a city. Your chart is yours alone: every morning AstroXP crosses the real sky with your birth, to the minute, and tells you what time it plays out for you.
On a computer? Scan this code with your phone.
Calendars
Sunrise and sunset calculated for the city (the Sun’s centre 0°50′ below the horizon: refraction and semi-diameter), local time of the city’s time zone. Checked against astronomy-engine, the app’s engine.